Wax-carver.



J. B. BUCHANAN. WAX CARVER.

APPLICATION FILED JUNE 27, 1914.

1, 1 29,634. Patented Feb. 23, 1915.

W/TNESSES: J B B 11% ran as. ac 0120/2. z 14TTOR/VEY E NORRIS PETERS CQ.PHOTC-LITHCL, WASHINGTON. D, C.

JAMES B. BUCHANAN, OF SEATTLE, WASHINGTON.

WAX-CARVER.

Specification of Letters Patent.

Patented Feb. 23, 1915.

Application filed June 27, 1914. Serial No. 847,676.

To all whom it may concern:

Be it known that I, JAMES B. BUCHANAN, a citizen of the United States,residing at Seattle, in the county of King and State of lVashington,have invented certain new and useful Improvements in lVax-Carvers; and Ido declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters and figures of referencemarked thereon, which form a part of this specification.

My invention relates to wax carvers, and more particularly to aninstrument for use by dentists for hollowing out the wax impression of acavity; the principal object of the invention being to provide a device,including an aspirator, for melting and siphoning wax from any part ofthe impression without distorting its shape or marrmg the surfaceadjacent the excavation.

It is customary in making dental inlays to make a wax impression of thecavity, secure a casting of the impression in a suitable non-corrosivemetal, and cement the casting in the tooth. It has been found that,owingto the weight of the metal and the peculiar shape of some inlays,the limited holding surface is insufficient to prevent the cement frombreaking and loosening the filling. In correcting this feature, I haveprovided an instrument for hollowing out the wax impression or cuttingany portlon of it away, so that when it is cast it will present the formof a light shell into which a sufficient quantity of cement may beplaced to obtain satisfactory anchorage onto the tooth and at the sametime out down the weight of the inlay. In accomplishing these objects, Ihave provided the improved details of structure hereinafter described,and illustrated in the accompanying drawings, wherein Figure I is anelevation of a wax carver constructed in accordance with my invention.Fig. II is an enlarged longitudinal section of the same. Fig. III is atransverse sectional view on the line IIIIII, Fig. II. Fig. IV is asimilar view on the line IV-IV, Fig. III, looking in the oppositedirection.

Beferring more in detail to the parts: 1 designates a metal body,preferably round and of sufficient size and thickness to retain heat fora certain period of time. Extending forwardly from said body is a neck 2having a central aperture 3, which extends into said body and which isadapted to receive a tube 4 having a flared outer end 5. lflntering therear of the body member is a second and smaller aperture 6 in which isrigidly mounted a carving tool 7, comprising a small tube that curvesdownwardly, as shown.

Iiigidly mounted on the outer face of the neck 2, and concentric withthe tube 4, is a tube 8, which extends a considerable distance beyondthe end of the tube 4, and which is provided with a laterally projectingtube 9. The tube 9 is rigidly secured to the tube 8 and enters the sameat a point adjacent the neck 2 and at the rear of the flared end 5 ofthe tube 4 and carries a nonheat conducting tube 11 of fiber or thelike, which abuts against a collar 12 on the tube and carries a flexiblerubber tube 13 that may be used as a mouth piece or connected directlyto a pressure tank (not shown).

In using the device, presuming the parts to be constructed as described,and it is desired to excavate the rear face of the wax impression of a.cavity; the instrument is placed over a Bunsen burner and the body 1heated sufficiently to melt wax. The operator then lifts the instrumentby grasping the fiber tube 11, touches the carving tool 7 to the waximpression and blows strongly through the rubber tube 13. This actioncauses air to rush at a high velocity past the tube 4 and creates asuction therein, which is transmitted to the tool 7 and draws the wax,as it is melted, from the impression. It is apparent that as the tube 4is much larger than the tube 7, the suction through the small tube ismuch greater, as compared with the velocity of the air through the tube4, therefore making it possible to secure excellent results with thebreath as the motive fluid. By flaring the mouth 5 of the tube 4, thevelocity of air from the mouth-piece is increased at this point, and thehot air from the tube 7, which has expanded in the tube 4, is drawn intothe current of air, through the tube 8, and thence to the atmosphere. Incleaning the tube'Y, which may become obstructed by wax and particles offoreign matter, the body 1 is heated to melt the wax, the finger isplaced over the free end of tube 8 and a current of air blown into thetube 13.

Having thus described my inventiomwhat I claim as new therein, anddesire to secure by Letters-Patent, is':' i

l. A wax carver comprising a heat retaining body, and a carving tooladapted to receive heat from said body.

2. A wax carver comprising a heat retaining body, a carving tool adaptedto receive heat from said body, and means for creating suction throughsaid carving tool.

3. A wax carver comprising a heat retaining body, a carving tool adaptedto receive heat from said body, and having a central duct, and means forcreating suction through said duct.

4:. A wax carver comprising a heat retain ing body, a carving toolcomprising a downwardly turned tube rigidly mounted in and adapted toreceive heat from said body, and an aspirator for creating suctionthrough said tool.

5. A wax carver comprising a heat retaining body, a tubular carving tooladapted to receive heat from said body, a tube projecting from theopposite side of said body and communicating with said carving tool, asecond tube projecting from said body and concentric with said firsttube, and a third tube projecting laterally from and communicating withthe second tube.

6. A Wax carver comprising a heat retaining body, a carving tool, a tubeprojecting from the opposite side of said body and communicating withsaid carving tool, a second tube rigidly secured to said body, andconcentric with and projecting beyond said first tube, and a third tubeprojecting laterally from and communicating with said second tube at apoint adjacent said body.

7. A wax carver comprising a heat retaining body, a carving toolcomprising a downwardly curved tube rigidly mounted in and adapted toreceive heat from said body, a tube projecting from the opposite side ofsaid body, of greater cross section than said carving tool tube, asecond tube rigidly mounted on said body and concentric with andprojecting beyond said first tube, a thirdv tube extending laterallyfrom and communicating with said second tube at a point adjacent'saidbody, a non-heat conducting tube mounted, on said third tube, and aflexible tube on said non-heat conducting tube, for the purpose setforth.

8. In a wax carver, a heat retaining body, a tubular carving tool insaid body, a tube having a flared end projecting from the opposite sideof said body and communicating with said carving tool, a second tuberigidly mounted on said body, and concentric with and spaced from saidsecond tube to form an annulus therebetween, a third tube communicatingwith said annulus, and a mouth piece on said tube whereby a current ofair may be forced through said annulus and past said flared end tocreate a suction in said first tube for said carving tool.

In testimony whereof I afiix my signature in presence of two witnesses.

JAMES B. BUCHANAN. Witnesses LYNN A. ROBINSON, LETA E. CoA'rs.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

